This is the Futaba S3170G Digital Planetary Gear Retract Servo.
FEATURES: For up to .60 size airplanes with mechanical retracts Metal planetary gears and dual bearings for smooth performance Proportional operation
INCLUDES: Futaba S3170G Digital Planetary Gear Retract Servo with universal connector
REQUIRES: Installing in airplane, connecting retract linkage and connecting to receiver
SPECS: Torque: 94 oz-in (7.0 kg-cm) @ 4.8V 118 oz-in (8.5 kg-cm) @ 6.0V Speed: 0.57 sec/60° @ 4.8V 0.47 sec/60° @ 6.0V Size: 1.4 x .6 x 1.0" (35 x 16 x 26mm) Weight: 0.9oz (26g) Rotation: 180°